Geodetic Control Points

Published by Office of the Chief Technology Officer | District of Columbia | Metadata Last Checked: February 12, 2026 | Last Modified: 2026-02-11T03:03:08.000Z

Control points are captured by land surveyors to create control for orthophotography. These points are captured with survey-grade equipment ensuring the highest accuracy in their location. Horizontal Control Point: Surveyed horizontal geodetic control points that are used in the development of an analytical aerotriangulation solution. Vertical Control Point: Surveyed vertical geodetic control points that are used in the development of an analytical aerotriangulation solution.

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District of Columbia OCTO Washington DC dc elevation geodetic control location planimetrics survey

Complete Metadata

identifier	https://www.arcgis.com/home/item.html?id=bc206662bbe7402abd1903706f535ed9&sublayer=1
issued	2015-02-27T21:07:19.000Z
landingPage	https://opendata.dc.gov/datasets/DCGIS::geodetic-control-points
spatial	-77.1118,38.8130,-76.9121,38.9945
theme	[ "geospatial" ]

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